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Science / Our Planet

Dams block the flow of a river to hold water in a reservoir, which can be used for agriculture, recreation, household needs or industry. The flow of water through a dam can generate hydroelectric power. Aging dams are being dismantled across the country, restoring the natural flow to rivers.

Dam Removals Are Bringing Fish Back Across the Northeastern United States, Striking Down One Tiny Barrier at a Time

While the demolition of big dams in the West gets more attention, many of these often-obsolete obstructions are also coming out of northeastern streams and rivers—and herring are returning in droves

Colorful coral flourish in New Caledonia, a French territory off the east coast of Australia, near a cliff overlooking beautiful, clear waters.  

These 15 Photos Showcase the Intensely Brilliant Colors of Coral Reefs and the Creatures That Live Among Them

These images from the Smithsonian Magazine Photo Contest highlight the importance of the marine ecosystems and the many species they help sustain

A Bubble Barrier creates a diagonal line of whiter water in Amsterdam's Westerdok.

Could This Dutch Invention Help Tackle Plastic Pollution in America’s Waterways?

The Netherlands has had success with the Bubble Barrier, which pumps air bubbles from the bottom of a canal or river to direct plastic to the surface. Now, Lansing, Michigan, is looking to be the first to install the technology stateside

Tyrannosaurus rex’s image has seen major adjustments over the past century.

Five Discoveries That Changed Our Understanding of T. Rex Forever, From Warm Blood to Lips

Paleontologists are still unraveling the secrets of the world’s most famous dinosaur, such as its outward appearance or the way that it hunted. With each new finding, our view of the “tyrant lizard king” has gotten a little clearer—and sometimes has radically shifted

Pottery fragments from Etowah in Georgia, where people of the Mississippian culture built large earthen mounds

Ancient Pottery Reveals the Earliest Known Traces of Chocolate East of the Mississippi, Painting a Picture of Connection in the Americas

A new archaeological discovery suggests that people in present-day Georgia have feasted with cacao for 1,000 years

On Scotland's uninhabited island of Staffa, Fingal’s Cave is formed from tall basalt columns created by ancient volcanic activity.

Seven Places in Europe That Legends Say Were Built by Giants, Devils or Dragons

Bridges, mountains, caves and rock formations that seem impossible to explain become magnets for folklore

In the lab, archaeologists showed how they could rapidly produce thick rope by threading cattail fibers through a replica of a Stone Age tool.

Archaeologists Are Reconstructing the ‘Invisible’ Technologies of the Stone Age, From Rope to Thread and Twine

Largely missing from the archaeological record, fiber innovations played a huge role in the lives of early humans. Researchers are weaving together new insights from the traces they left behind

Smoke from massive wildfires in Canada engulfed the New York City skyline, reducing visibility and casting an orange haze over city on July 16, 2026.

From 22,000 Miles Up, This Satellite Tracks Airborne Health Threats Almost in Real Time

The new instrument, called TEMPO, captures hourly snapshots of the pollutants swirling in the daytime atmosphere over North America—“chemical weather” reports that are helpful to public health researchers and government officials

The Earth in the Mesozoic Era, when dinosaurs roamed the planet, looked much unlike how it does today—even beyond presence of creatures like Giganotosaurus.

Five Ways the World of the Dinosaurs Looked Different From Ours, Beyond the Presence of the ‘Terrible Lizards’

Earth has changed dramatically since the Age of Dinosaurs, from its climate to geography and animal life

Lake sturgeon—massive and long-living fish in the Great Lakes—may survive to much older ages than scientists previously thought, according to a recent study. Here, a juvenile lake sturgeon is captured during a fisheries assessment in the St. Clair-Detroit River System.

Some Fish in the Great Lakes Might Be More Than 400 Years Old, a Study Suggests, Outliving Around 15 Generations of Humans

Lake sturgeon may be among the longest-living vertebrates, second only to Greenland sharks, according to recent research. However, scientists note that follow-up work is necessary to clarify the species’ life span

The white-headed duck is “one of the true eccentrics of the waterfowl world because almost everything about it seems unusual,” says waterfowl expert Nicky Petkov.

Spain’s White-Headed Ducks Have a Signature Color Right in the Name. And That Isn’t Even Their Most Remarkable Hue

The first thing you’re likely to notice is the blue bill. But beyond appearances, the duck has an exciting story to tell about conservation and recovery

In loud conditions, a tokay gecko adjusts its call, which is typically used to find a mate or defend territory.

Reptiles Make a Surprising Amount of Noise. Here’s What Those Sounds Might Mean, From Pops to Hoots to Bellows

Scientists are realizing that turtles, lizards and crocodilians communicate vocally more than they once thought

Tennis courts where the author played at Outbound Sedona in the Arizona heat

Tennis Matches Are Heating Up, Literally. Here’s How the Court Became a Living Laboratory for Managing Extreme Temperatures

The sport’s hard-court surfaces can reach some 30 degrees hotter than the surrounding air. With elite players suffering heat illness on the world stage, athletes are following personalized cooling plans

A pair of African wild dogs at Tswalu Kalahari Reserve, the largest privately owned nature reserve in South Africa, near the Botswana border.

Africa’s Wild Dogs Are the Most Hated Carnivores on the Continent. Here’s Why Some Conservationists Are Saving Them Anyway

Meet the team that closely monitors the playful canines, which need help to form diverse packs and stop their numbers from dwindling

A harbor porpoise surfaces near the Golden Gate Bridge.

Marine Biologists Solved a Wildlife Mystery From the Walkway of the Golden Gate Bridge: How the Harbor Porpoise Mates

The dolphin-like marine mammals returned to San Francisco Bay in 2008 after a decades-long absence from the area. Scientists took the rare opportunity to closely observe their behavior, and what they uncovered might help at-risk porpoise populations

The mushroom Psilocybe pelliculosa is one of several species that produce psilocybin, a natural compound with hallucinogenic properties.

Could Psilocybin Help Treat Anorexia? A Small Clinical Trial Suggests the Psychedelic May Make Patients More Open to Recovery

The drug, paired with intensive psychological support, may loosen the rigid patterns of thought associated with the eating disorder, scientists say—but they caution that it is not a magic cure

The crew of the Artemis 2 mission captured this image of a total solar eclipse just after rounding the far side of the moon on April 6.

‘Like a Hole in the Universe’: Artemis 2 Astronaut Victor Glover Reflects on Seeing a Total Solar Eclipse While Flying by the Moon

The four astronauts who rounded Earth’s natural satellite in April got an extremely rare view of the dark lunar disk blocking out the sun. Researchers say the observations provide unique scientific value for understanding our star’s mysteries

A koala, Phascolarctos cinereus, with her babies at Australia Zoo Wildlife Hospital, 2011

This Amazing Archive of Animal Photography Reveals 18,000 Species and Counting. Here’s How Joel Sartore Built His ‘Photo Ark’

For 20 years, the National Geographic photographer has showcased Earth’s animals in a series of striking images that make even the tiniest creatures look immense

A surfer rides a wave during a competition in the Ngor district of Dakar, Senegal, the most westerly point of mainland Africa.

Big Waves Meet Biodiversity: Why Surfing Paradises Could Offer a Key Opportunity for Marine Conservation

A recent mapping study examines places in northwestern Africa where coastal ecosystems overlap with surf breaks, highlighting areas that could support recreation, the environment and local economies, if protected

With Eco Purge, Arya Satheesh won the European category of the 2026 Earth Prize, the largest environmental competition in the world for young students. She was awarded $12,500 to continue to develop her prototype.

This High Schooler Invented a Plant-Based Plastic That Removes Microplastics From the Environment as It Biodegrades

Eighteen-year-old Arya Satheesh created her award-winning Eco Purge to help address the global problem of plastic pollution

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